Ap. Aguiar et Jw. Janzen, An overview of fossil Stephanidae (Hymenoptera), with description of two new taxa from Baltic amber, and key to species of Electrostephanus Brues, ENT SC, 30(4), 1999, pp. 443-452
Protostephanus ashmeadi Cockerell is confirmed to be a stephanid. and illus
trated. The taxonomic status of Protostephanus Cockerell and Electrostephan
us Brues, their relationships with extant genera of Stephanidae, and proble
ms in defining or synonymizing fossil genera of the family are discussed. E
lectrostephanus is provisorily redefined, two fossil species, E. sulcatus s
p. n. and E. neovenatus sp. n. are described and illustrated from male spec
imens preserved in Eocene Baltic amber, and a key to species provided.